Cable-grip



(No Model.)A

L. D. LIBBEY.

CABLE GRIP.

@ted Nov. 15, 1887.

gfwf. l

ttorney,

UNITED STATES PATENT OFFICE.

LEON D. LIBBEY, OF WYANDOTTE, KANSAS.

CABLE-emp.

SPECIFICATION forming part of Letters Patent No. 373,188, dated November` l5, 18877. f Application filed May 28, 1887. Serial No.'239,653. (No model.)

To aZZ whom t may concern:

Be it known that I, LEoN D. LIBBEY, of Wyandotte, Wyandotte county, State of Kausas, have invented a certain new and useful Improvement in Gable-Grips, of which the following is a full, clear, and exact description, reference being had to the accompanying draw-- ings, forming a part hereof.

The object of this invention is to provide a grip that will be more powerful and positive in action than those heretofore used; and it may be said to consist in the devices andcombination and arrangement of devices hereinafter set forth, and pointed out in the claims.

In the drawings, Figure l is a side elevation of my improved grip. Fig. 2 is a detail View of the jaw-operating devices in perspective; and Fig. 3 is a section through the grippingjaws and the framing of the grip on line :v w, Fig. l. 1

The frame of the grip may be of any ordinary construction, and it may consist of the vertical bars F, carrying a notched bar, G, at their upper ends. The movable jaw I is carried by a lifting frame or bar, D, which is adapted to e raised and lowered by the action of the operating-levers.- r

The lifting-frame D is guided in-its verticalv movements by the bars F, between which it operates, and it is adapted to be lilted by a pin or roller, c, projecting from one side of an adjusting-cam, B'.

The stationary jaw H is provided with supporting-rollers t', in the usual manner. The lifting-frame D is provided with a longitudinal slot, d, within which the roller o moves back and forth during the operation of the grip.

The roller c is mounted on a pin projecting from one side of cam B. In some cases I may dispense with said roller and use a simple pin in place of it. Said roller is adapted to enn* gage a cam-surface, g, forming the upper side of the slot d in the lifting-frame D. A curved ping lever, A. The lever A is provided at its upper end with the ordinary devices for` holding it at any desired point of adjustment, and its lower end is rigidly attached to the power-'cam A', while the lifting-lever Bis also provided with devices at its upper end for holding it in any desired positon,and its lower end is rigidly attached to the exterior cam, B'. The cam B' is adapted to engage the upper surface of jaw I to press it down upon the cable, and the interior cam, A', is mounted on a journal, C, carried by opposite cross-bars, c. The exterior cam, B', is mounted upon and carried by the interior cam, both cams being carried by and operated upon a journal that is common to both. This arrangement may be termed a cam within a cam, the interior cam forming the journal for the exterior cam.

The adjusting-lever B may be attached to the cam B in any desired way. When the lever A is formed integral with the cam A', as shown, it will be necessary to form cam B in two pieces, so that the interior cam may be placed in position within the exterior cam, and for such purpose I make one side of cam B' in the form of a movable plate, b, and attach it to the main body of the cam by means of screws, rivets, or bolts.

With this construction the operation of the invention will be about as follows:v To pick up the cable the levers are to be both thrown pressing the exterior one forcibly against the upper side ofthe movable jaw I, and causing the latter to force the cable down upon the lower jaw, thus imparting a very powerful pressure -to the cable. Throwing the adjusting-lever B toward the right hand at any time,

without altering the position of the other lever,

will release the cable or remove the grippingpower therefrom and permit it to pass freely through the jaws. Sufficient power for pulling the cars on a level track will be given by simply operating'the adjusting-lever; but on IOO steep hillsn additional power may be applied to the cable by the lever A.

It will be understood that the cam B is arranged to operate the jaw I, which, of course, may be done in various ways that need not be described here.

In operating both levers at once to drop the cable, or for any other purpose, the cams do not change their relative position, but turn with thejournal C.

The gripping-jaws and the jawbperating devices can eitherbe operated below the surface of the ground in the Conduit or from above the slot-rails, as may be desired. In either ease the operation of the invention will be substantially the same.

W'hen the adjusting-lever B is thrown toward the right hand in Fig. 2, the cable cannot escape and be dropped inadvertently. At the same time the cable will be permitted to run loosely through the gripping-jaws.

In Fig. 1 one ofthe side bars is removed for exhibiting the position of the cams. Fig. 2 shows the side ofthe grip that is opposite the side shown in Fig. 1.

By my invention I providea Cable-grip that is operated by the joint action of two leversan adjusting-lever and a power-lever-as described.

Having thus described my invention, what I claim is- 1. The combination of thejaws, the framing of the grip, an adjusting-cam and a lever for operating said cam, and an additional lever for imparting increased pressure to the jaws, substantially as set forth.

2. The combination, with the jaws and the framing ofthe grip, of a cam mounted in said framing, another cam mounted upon the rst mentioned cam, and operating-levers, substantially as set forth.

3. The combination. with the jaws and the framing of the grip, of an interior cam journaled in said framing. and an exteriorcam mounted upon the interior cam, both cams be- 

